Can you help me to solve the following integer?

- anonymous

Can you help me to solve the following integer?

- schrodinger

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- anonymous

|dw:1328759896228:dw|

- bahrom7893

Let u = x^2

- bahrom7893

hold on ill draw, this is inverse sin

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## More answers

- anonymous

ok thanks

- bahrom7893

|dw:1328760042213:dw|
nevermind it was double u-sub

- anonymous

ok

- bahrom7893

hmm no.. hold on, i'm sure it's one of these subs..

- anonymous

Dont worry, I have been trying to solve it for more that an hour. So I will wait

- anonymous

It doesn't look like a double u-sub...? Or were you thinking that it was a trig sub?

- bahrom7893

yea i think so..

- anonymous

that works though, your double u-sub is fine

- bahrom7893

Wolf to the rescue!

##### 1 Attachment

- anonymous

Ew, a double u-sub and a tan integral. NO, DON'T GIVE ME A MEDAL. I didn't do anything lol.

- anonymous

You deserve that anyway

- anonymous

i don't think you have to do a tan integral do you?
what if you u just went w = u^2-1
dw =2udu
dw/2u=du

- anonymous

|dw:1328760546289:dw|

- anonymous

solve that and then do all the subbing

- anonymous

dont get it

- anonymous

sorry, can you post it?

- anonymous

does that make sense to anyone else, cause i could be way out

- anonymous

It doesn't cancel the u outside the sqrt in the denominator, unless I'm mistaken. Which is why a tan is necessary.

- anonymous

yeah, wishful thinking i guess. looks wrong now that i think about it. Sorry you gotsa suffer through the trig integral

- anonymous

Its ok

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